Gilson Guimarães
Universidade Estadual de Ponta Grossa, Geosciences, Faculty Member
A pterosaur bone bed with at least 47 individuals (wing spans: 0.65–2.35 m) of a new species is reported from southern Brazil from an interdunal lake deposit of a Cretaceous desert, shedding new light on several biological aspects of... more
A pterosaur bone bed with at least 47 individuals (wing spans: 0.65–2.35 m) of a new species is reported from southern
Brazil from an interdunal lake deposit of a Cretaceous desert, shedding new light on several biological aspects of those
flying reptiles. The material represents a new pterosaur, Caiuajara dobruskii gen. et sp. nov., that is the southermost
occurrence of the edentulous clade Tapejaridae (Tapejarinae, Pterodactyloidea) recovered so far. Caiuajara dobruskii differs
from all other members of this clade in several cranial features, including the presence of a ventral sagittal bony expansion
projected inside the nasoantorbital fenestra, which is formed by the premaxillae; and features of the lower jaw, like a
marked rounded depression in the occlusal concavity of the dentary. Ontogenetic variation of Caiuajara dobruskii is mainly
reflected in the size and inclination of the premaxillary crest, changing from small and inclined (,115u) in juveniles to large
and steep (,90u) in adults. No particular ontogenetic features are observed in postcranial elements. The available
information suggests that this species was gregarious, living in colonies, and most likely precocial, being able to fly at a very
young age, which might have been a general trend for at least derived pterosaurs.
Brazil from an interdunal lake deposit of a Cretaceous desert, shedding new light on several biological aspects of those
flying reptiles. The material represents a new pterosaur, Caiuajara dobruskii gen. et sp. nov., that is the southermost
occurrence of the edentulous clade Tapejaridae (Tapejarinae, Pterodactyloidea) recovered so far. Caiuajara dobruskii differs
from all other members of this clade in several cranial features, including the presence of a ventral sagittal bony expansion
projected inside the nasoantorbital fenestra, which is formed by the premaxillae; and features of the lower jaw, like a
marked rounded depression in the occlusal concavity of the dentary. Ontogenetic variation of Caiuajara dobruskii is mainly
reflected in the size and inclination of the premaxillary crest, changing from small and inclined (,115u) in juveniles to large
and steep (,90u) in adults. No particular ontogenetic features are observed in postcranial elements. The available
information suggests that this species was gregarious, living in colonies, and most likely precocial, being able to fly at a very
young age, which might have been a general trend for at least derived pterosaurs.
Research Interests:
Research Interests:
Page 1. DESAFIOS E CONQUISTAS DA GEOCONSERVAÇÃO NO PARQUE ESTADUAL DE VILA VELHA PARANÁ Gilson Burigo Guimarães (1); Mário Sérgio de Melo (2); Gil Francisco Piekarz (3); Jasmine Cardozo Moreira ...
Research Interests:
... resultar na geração de empregos nas comunidades locais; elaborar material didático para a difusão do conhecimento da geologia dos SGP; integrar geologia e turismo. É filosofia básica do projeto a integração entre as várias... more
... resultar na geração de empregos nas comunidades locais; elaborar material didático para a difusão do conhecimento da geologia dos SGP; integrar geologia e turismo. É filosofia básica do projeto a integração entre as várias instituições que possam atuar para o alcance ...